Extremely disappointed with this device ... Autonomy is relatively low (about twenty minutes, although insufficient to clean her house one time without rusher like crazy to hope to be able to do if only half). The biggest aspiration is lost after 5 minutes, but even at full power the result is not conclusive. You have a choice between 2 suction modes: a "shit I aspire" and a way "I aspire not much."
In short it is a very useful vacuum cleaner to have a quickie when there is a land of dust, but to make a real household, forget on. In other words, considering its price, relevance is relative. Nothing beats a good old yarn to the final vacuum.